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Hi All, I wonder if you can help me with an aparently simple task.  I have been searching examples for this without any luck: #Assume x<-1:10  #x ranges from 1 to 10. y<-x*runif(10)+ 1.5*x  #y is a linear function of x with some error. Add uniform error that is scaled to be larger as x values also become larger #error is proportional to x size, this should cause heterocedasticity. #I

...all the steps and documented them here: http://code.google.com/p/jwanalytics/wiki/GnuRe Thanks for making it easy to do it. The help files within GNU R are excellent quality. Best regards, Andr? -------------------------------------------- Andre Cesta, Eng, MSc, SCJP, SCJA http://geocities.com/aacesta -------------------------------------------- __________________________________________________________ Not happy with your email address?. Get the one you really want - millions of new email addresses avail

...all the steps and documented them here: http://code.google.com/p/jwanalytics/wiki/GnuRe Thanks for making it easy to do it. The help files within GNU R are excellent quality. Best regards, Andr? -------------------------------------------- Andre Cesta, Eng, MSc, SCJP, SCJA http://geocities.com/aacesta -------------------------------------------- __________________________________________________________ Not happy with your email address?. Get the one you really want - millions of new email addresses avail